9003-54-7 Usage
Description
Poly(styrene-co-acrylonitrile) is a copolymer composed of styrene and acrylonitrile monomers, which combines the properties of both materials to create a versatile and durable plastic material.
Uses
Used in Packaging Industry:
Poly(styrene-co-acrylonitrile) is used as a thin tubing material for producing Saran Wrap, a product with high tensile strength (15,000 psi or 103 MPa) and high transparency to light. Its high coefficient of static friction (0.95) and low permeability to gases such as oxygen and nitrogen make it ideal for protecting food in households.
Used in Coating Industry:
Poly(styrene-co-acrylonitrile) is used as a latex coating for materials like cellophane, polyethylene, and paper. Its solubility in organic solvents allows it to be used as a solution coating, enhancing the resistance to vapor permeability and improving the ease of printing on coated materials.
Used in Fiber and Film Production:
The tensile strength of both film and fiber made from Poly(styrene-co-acrylonitrile) can be significantly increased through cold drawing, reaching up to 40,000 psi (276 MPa) in the direction of draw. This makes it suitable for applications requiring high tensile strength and durability.
Production Methods
POLYVINYLIDENE CHLORIDE.. A stereoregular, thermoplastic polymer is produced by the free-radical chain polymerization of vinylidene chloride (H2C=CCl2) using suspension or emulsion techniques. The monomer has a bp of 31.6 °C and was first synthesized in 1838 by Regnault, who dehydrochlorinated 1,1,2-trichloroethane which he obtained by the chlorination of ethylene. The copolymer product has been produced under various names, including Saran. Since this monomer readily forms an explosive peroxide, it must be kept under a nitrogen atmosphere at ?10 °C in the absence of sunlight. The copolymers were patented by Wiley, Scott, and Seymour in the early 1940s. A typical formulation for emulsion copolymerization contains vinylidene (85 g), vinyl chloride (15 g), methylhydroxypropylcellulose (0.05 g), lauroyl peroxide (0.3 g) and water (200 g). More than 95 per cent of these monomers are converted to copolymer when this aqueous suspension is agitated in an oxygen-free atmosphere for 40 hrs at 60 °C. The glass transition temperature of the homopolymer is ?17 °C. It has a specific gravity of 1.875 and a solubility parameter of 9.8.
Safety Profile
Moderately to hghly toxic by ingestion. Questionable carcinogenSee also NITRILES. When heated to decomposition it emits toxic fumes of NOX, and CN-.
Check Digit Verification of cas no
The CAS Registry Mumber 9003-54-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,0 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 9003-54:
(6*9)+(5*0)+(4*0)+(3*3)+(2*5)+(1*4)=77
77 % 10 = 7
So 9003-54-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H8.C3H3N/c1-2-8-6-4-3-5-7-8;1-2-3-4/h2-7H,1H2;2H,1H2
